package cn.tedu.v3_1;
import java.io.*;
import java.net.*;
import java.util.*;
/*
  Client 客户端--改成 Server 端模式 【优化】  15分  18:30完成

 */
public class Client {
    private Socket socket;
    private static final String HOST="127.0.0.1";
    private static final Integer PORT=4545;
    private PrintWriter pw;
    private BufferedReader br;

    public Client() {
        try {
            socket=new Socket(HOST,PORT);
            br=new BufferedReader(new InputStreamReader(socket.getInputStream(),"UTF8"));
            pw=new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(),"UTF8")),true);
        } catch (NullPointerException e){
            System.out.println("友情提示：IP传入错误导致链接失败~");
        } catch (UnknownHostException e){
            System.out.println("友情提示：IP传入错误");
        } catch (ConnectException e){
            System.out.println("客户端链接失败：建议检查IP或者端口号");
        } catch (IOException e) {
            System.out.println("客户端链接服务器失败，提示：检查IP/端口");
        }
    }

    public void start(){
        try {
            new Thread(()->{
                try {
                    String message;
                    while((message=br.readLine())!=null){
                        System.out.println("服务器端说：" +message);
                        System.out.println("客户端请输入：");
                    }
                } catch (IOException e) {
                    System.out.println("服务器端读入失败！");
                }
            }).start();

            Scanner input=new Scanner(System.in);
            while(true){
                System.out.println("客户端请输入：");
                String line=input.nextLine();
                pw.println("客户端说："+line);
            }
        } finally {
            if(br!=null)
                try {
                    br.close();
                } catch (IOException e) {
                    System.out.println("客户端关闭失败~");
                }
            if(pw!=null)
                pw.close();
            if(socket!=null&&!socket.isClosed())
                try {
                    socket.close();
                } catch (IOException e) {
                    System.out.println("通讯关闭失败~");
                }
        }
    }

    public static void main(String[] args){
        new Client().start();
    }
}
